Ring laser gyroscope

About: Ring laser gyroscope is a research topic. Over the lifetime, 2070 publications have been published within this topic receiving 18609 citations. The topic is also known as: Sagnac interferometer.

Ring laser gyro temperature drift model based on artificial neural network

Abstract: The paper studies the modeling of temperature characteristics for the drift of ring laser gyro(RLG) with enclosed case after Strapdown Inertial Navigation System(SINS) being powered on under normal temperature.A set of self-rising temperature tests under different external temperature environments are made which show that the SINS box can keep the inside temperature rising gently and uniformly by its isolating capability,in which the drift is mainly related to the temperature changes of temperature field.Take the static test data from temperature 25℃ to 55℃ as training samples,we set up the drift temperature models based on BP and RBF neural network respectively,and use another four experiment data to check the validity of this method.The experiment results show that if taking the MSE(mean square error) as criteria,the stability of gyro can be improved by 20%-40%,the accuracy of BP network modeling is better than that of first-order linear piecewise fitting with Least Square(LS),and the accuracy of RBF network modeling is better than that of second-order LS Fitting.

Research and application of a pocket CO2 laser in the near field

Abstract: The axisymmetrical structural traveling wave cavity (ASSC) CO2 laser is introduced based on the propagation theory of the standing wave cavity CO2 laser. Then the propagation characteristics of the elliptically polarized Gaussian beam are studied in detail. The transforms of the coordinate were used to solve the near field distributions of the output laser beams. The numerical calculations show that the combination of the output beams in the near field can be fulfilled. The diminutive ASSC CO2 laser can be applied into the laser gyro and the measure of the angular velocity.

Laser gyroscope annular resonant cavity light path alignment device and method

Abstract: The invention belongs to laser technology, and relates to a laser gyroscope annular resonant cavity light path alignment device and method. The laser gyroscope annular resonant cavity light path alignment device comprises a laser device, a light path adjusting component, polarizers, a half transparent and half reflecting mirror, high-reflectivity mirrors, plane mirrors, spherical mirrors, cavity adjusting tools and photoelectric receivers, wherein light output by the laser device enters the polarizers and the half transparent and half reflecting mirror after being adjusted through a light beam adjusting mechanism, then one path of light is directly injected into an annular resonant cavity in the horizontal direction, and the other path of light is reflected by the high-reflectivity mirrors and then is injected into the resonant cavity in the vertical direction. The photoelectric receivers are connected with the resonant cavity through the polarizers and used for detecting output light in the horizontal and vertical direction respectively. The spherical mirrors are dynamically adjusted in real time according to characteristics of linearly polarized light received by the two receiving light paths, annular resonant cavity light path alignment is completed until extinction coefficients of polarized light clockwise and counter-clockwise paths are equal, and tiny non-coplanar light path compensation of the annular resonant cavity is achieved.

Study of a Novel Micro-mechanical Gyroscope using for Rotation Carrier

Abstract: In this paper, a novel silicon micro-machined gyroscope is introduced, which is driven by the rotating carrier’s angular velocity. The principle of structure is analyzed .The mathematic module is also established and the dynamics parameters of the gyroscope is calculated, Design and analysis of signal processing circuit, design and processing of the gyroscope sensing head, at last, the gyroscope is tested, the test results and the theoretical analysis is consistent。